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ing in frame" unecessary and minimising the possiblity of damage to the film. The arrangement also lowers the rate of normal wear of both machine and film.
The spool arms are built-in and of the folding type, and are made to carry spools up to 2,000' capacity. The take-up is of original design, and provides automatic compensation for the increasing diameter of the spool during projection. Rewinding is power-driven, and actuated by moving a handy lever.
Provision for lubrication is made easy by the single oilingpoint, and the projector is fitted with grease-packed ball-bearings throughout.
The sound from the 301 is exceptional, a completely new amplifier giving 8/10 watts output with minimum distortion.*
Valves are easily accessible, and may be removed by first removing the projector cover. Faithful reproduction of sound is made possible by an extended frequency response, and the single tone-control provides adequate compensation for poor recording and bad hall acoustics.
The sound optics are provided with a speedy "snap over" device for correct sound focus when using either monochrome or coloured films.
A well matched loud-speaker is built into its own carrying case, and the latter, besides acting as a baffle, is used to house the 50' of speaker lead and a spare spool. The speaker has a 12" base and is of the permanent magnet type.
All controls are grouped to one side of the machine, and include a quick acting device for tilting the projector, and a screw adjustment for focussing. Sound and silent film-speeds are selected by using the appropriate switch, and a very efficient A.C. capacity motor entirely eliminates speed variations and commutator troubles.
The cooling system is another excellent feature — a dual forced draught ensuring that both the amplifier and mechanism are amply cooled and the temperature kept well within safety limits.
Type-301 is now being distributed throughout the country, and most cine dealers should be able to arrange a demonstration or supply the reader with further information. In case of difficulty, however, you may apply to The British Thomson-Hous
*A11 amplifiers produce some distortion. 158